<script setup>
import { userRegisterService ,userLoginService} from '@/api/user.js'
import { User, Lock } from '@element-plus/icons-vue'
import { watch ,ref} from 'vue';
import { useUserStore } from '@/stores';
import {useRouter} from 'vue-router'
const isRegister = ref(false)
const form = ref()

//整个的用于提交的form数据对象
const formModel = ref({
   username: '',
   password: '',
   repassword:''
})
/* 整个表单的校验规则
1.非空校验 required:true  message消息提示  trigger触发校验的时机： blur失焦时校验 change改变时校验
2.长度校验 min：xx max:xx
3.正则校验 pattern:正则规则 \S非空字符
4.自定义校验 => 自己写逻辑校验(校验函数)
 validator：（rule，value，callback）
  (1) rule 当前校验规则相关的信息
  (2)value 所校验的表单元素目前的表单值
  (3)callback 无论成功还是失败，都需要callback回调
      callback()校验成功
      callback(new Error(错误信息)) 校验失败
       */
const rules = {
  username: [
    { required: true, message: '请输入用户名', trigger: 'blur' },
    {min:5,max:10,message:'用户名必须是5-10位的字符', trigger:'blur'}
  ],
  password: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    {pattern:/^\S{6,15}$/,message:'密码必须是6-15位的非空字符',trigger:'blur'}
  ],
  repassword:[
 { required: true, message: '请再次输入密码', trigger: 'blur' },
    { pattern: /^\S{6,15}$/, message: '密码必须是6-15位的非空字符', trigger: 'blur' },
    {
      validator: (rule, value, callback) => {
         // 判断value和当前form中收集的password是否一致
        if (value !== formModel.value.password) {
  callback(new Error('两次输入密码不一致'))
        } else {
          callback() //就算校验成功也需要callback
        }
      },
        trigger:'blur'
    }
  ] 
}

// 注册预校验，对整个表单的内容进行验证。 接收一个回调函数，或返回 Promise
const register = async () => {
  // 注册成功之前，先进行校验，校验成功->请求，校验失败->自动提示
  await form.value.validate()
  //  要把username、password、repassword都传过去，这些都在form里，所以传form.value就行
  await userRegisterService(formModel.value)
    ElMessage.success('注册成功')
    isRegister.value=false
}


const userStore = useUserStore()
const router =useRouter()
// 登录预校验
const login = async () => {
  await form.value.validate();
  // 这个要用res接收一下因为里面有token，需要将来存到pinia里面去
  const res = await userLoginService(formModel.value)
  userStore.setToken(res.data.token)
  ElMessage.success('登陆成功')
    router.push('/')
}

// 切换的时候，重置表单内容，注册里填写的内容切换的时候不能带到登录表单中
watch(isRegister, () => {
  formModel.value = {
    uaername: '',
    password: '',
    repassword:''
  }
})
</script>

<template>
  <!-- 
   1.结构相关
   el-row表示一行，一行分成24份 
       el-col表示列 
      (1):span="12"  代表在一行中，占12份 
      (2):span="6"  表示在一行中，占6份 
      (3):offset="3"   代表在一行中，左侧margin份数

      el-form      整个表单组件
      el-form-item 表单的一行（一个表单域）
      el-input     表单元素（输入框）
   2.校验相关
   (1) el-form :model="ruleForm"                   绑定的整个form的数据对象 {xxx,xxx,xxx}
   (2)el-form :rules="rules"  绑定的整个rules规则对象,分别对应上面每项的规则  {xxx,xxx,xxx}
   (3)表单元素 => v-model="rulesForm.xxx"  给表单元素，绑定form的子属性
   (4)el-form-item => prop配置生效的是哪个校验规则（和rules中的字段要对应）
 -->
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
      <!-- 注册相关表单 -->
      <el-form :model="formModel" 
      :rules="rules"
      ref="form" size="large"
       autocomplete="off" 
       v-if="isRegister">
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input 
          v-model="formModel.username"
           :prefix-icon="User" 
           placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
          v-model="formModel.password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item prop="repassword">
          <el-input
          v-model="formModel.repassword"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入再次密码"
          ></el-input>
        </el-form-item>
        <el-form-item>
          <el-button @click="register" class="button" type="primary" auto-insert-space>
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false">
            ← 返回
          </el-link>
        </el-form-item>
      </el-form>
      <!-- 登陆相关表单 -->
      <el-form :model="formModel"
      :rules="rules"
       ref="form" size="large" 
       autocomplete="off" v-else>
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
           v-model="formModel.password"
            name="password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码？</el-link>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button @click="login" class="button" type="primary" auto-insert-space
            >登录</el-button
          >
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true">
            注册 →
          </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
.login-page {
  height: 100vh;
  background-color: #fff;
  .bg {
    background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
      url('@/assets/login_bg.jpg') no-repeat center / cover;
    border-radius: 0 20px 20px 0;
  }
  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;
    .title {
      margin: 0 auto;
    }
    .button {
      width: 100%;
    }
    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>